设计了DEM数据极低比特率压缩方法，压缩数据隐藏在伪装数据中。
A method is designed to compress the DEM data with a very low bit ratio which would be hidden in the disguised data.
首先，论文介绍了基于小波的视频编码器的基本原理，提出一种新的适用于低比特率压缩场景的视频编码器方案。
First, the theoretical foundations of wavelet based video coder as well as a new video coder for low bit rate video compression used in this research are presented.
借助这5个组合框，我们选择支持如下配置：视频的分辨率、帧率和比特率，以及视频的采样率和压缩比特率。
With out six combo boxes, we opted to allow the configuration of the video resolution, framerate and bitrate, as well as the audio sample rate and the compression bitrate.
低比特率时，基于块离散余弦变换(BDCT)的图像压缩方法常常会引起块效应。
At low bit rates, the block Discrete Cosine Transform (BDCT) compression methods often give rise to blocking artifacts.
本文回顾了近年来在低比特率图像压缩技术研究、开发及应用领域的简况。
The recent research, development and applications of low bitrate picture compression techniques are reviewed in this paper.
高清晰度，低比特率的图像压缩技术是研究井下电视的关键技术之一。
High quality, low bit rate image compression method is one of the key technologies to develop downhole video logging instrument.
低比特率JPEG压缩图象往往产生严重的方块效应。
Low bit rate JPEG compressed images usually demonstrate serious blocking effects.
设计中采用了DSP、低比特率语音压缩编解码、信道复用、快闪存储、串口和调制解调器通信等技术。
In this design many technologies such as DSP, low bit-rate speech compression, channel multiplexing, Flash Memory and communication with modem through se rial port are used.
相对于以前的视频压缩标准来说，H . 264是现在首选的标准，在保障视频质量的同时又大大降低了视频文件的比特率。
H. 264 is the preferred video encoding compression standard capable of providing good video quality at substantially lower bit rates than previous standards.
因此，有必要继续深入研究视频图像的特点与压缩机理，以实现甚低比特率下视频图像实时传输的目标。
So it is necessary to further study the characteristics of video and compression mechanism deeply and to achieve live transmission of videos at very low bit rate.
实验结果表明，该方法能有效降低高频子带的信息熵，降低图像的无损压缩比特率，计算复杂度上升不大。
Experiments show that the scheme can greatly decrease the entropy of high passes and the lossless image compression bit rate, while the computational complexity increases slightly.
视频压缩编码的主要目标就是在比特率受限条件下，尽量使编码失真最小。
The main target of video compression code is to limit the distortion of code under the condition of restricted rate.
针对离散余弦变换基于块（DCT）图像压缩的方法通常因比特率低而导致块效应，结合人类视觉系统（HVS）和局部熵分析，提出一种新的去块效应算法。
The block-based DCT compression methods often cause blocking artifacts due to low bit rates. A new algorithm is proposed which combines HVS and entropy analysis.
然而，基于DCT的传统视频压缩方法由于在低比特率下出现块失真严重影响恢复视频质量。
Unfortunately, in these situations, the notorious blocking artifacts resulting from block DCT set a severe limit on the achievable bit-rate with acceptable quality.
理论和实验表明，在超低比特率图象通信应用领域，该算法图象压缩效率高，图象恢复效果好。
The theoretical and experimental results show that the proposed algorithm can achieve higher compression efficiency than DCT and the W transform based method in very low bit rate communication.
仿真实验结果表明，所提出的图像编码方法是一种高效的图像压缩算法，其压缩效果明显优于SPIHT等编码方法(特别是低比特率下)。
The experiment results show that the new still image compression scheme provides higher perceptual quality and higher PSNRs than SPIHT etc., especially at low bit rates.
对未压缩视频不能使用可变比特率编码。
You cannot use variable bit rate encoding with uncompressed video.
虽然视频压缩技术在当今的信息时代中得到迅猛发展，但目前现有的视频压缩技术仍不能满足甚低比特率下实时传输视频图像的要求。
Although the video compression technique has been investigated extensively and developed rapidly, it still can not meet the requirement of live transmission at very low bit rate.
本次系统实现了基于AMBE2000的低速率语音通信，该芯片采用改进的多带激励(MBE)算法，能实现可变速率低比特率、高语音音质的语音压缩编码。
This system realized a voice communication system based on the AMBE2000, this chip USES the MBE algorithm to obtain low changeable communication rate, and high speech quality.
预存储的变比特率（VBR）压缩的视频网上流式传输，提供实时视频服务。
Variable bit rate (VBR) compressed video exhibits significant rate variability, this burstiness complicates the network bandwidth reserve, admission control and etc.
本文设计并实现了一个基于DSP的低比特率视频压缩硬件平台。
This paper designs and realizes a low-bit video compression hardware platform based on DSP.
数字语音压缩的目的是在保证语音一定质量的前提下尽可能降低其编码比特率，提高有限传输带宽的利用率。
Premised on assurance of speech quality, digital speech coding can reduce rate of bits, for the purpose of increasing use of finite bandwidth.
实验结果表明，改进方法减少了编码比特率和编码时间，达到了较好的压缩效果。
The experiment results showed that the improved methods were simple and effective, it could decrease rate of bit and time of coding.
视频压缩编码目的就是在比特率受限条件下，尽量使编码失真最小。
Video coding is intended to minimize the distortion subject to a constraint bit rate.
视频压缩编码目的就是在比特率受限条件下，尽量使编码失真最小。
Video coding is intended to minimize the distortion subject to a constraint bit rate.
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